This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 6 |
| 4 | 14 |
| 5 | 40 |
| 6 | 84 |
| 7 | 224 |
| 8 | 484 |
| 9 | 1134 |
| 10 | 2480 |
| 11 | 5632 |
| 12 | 12036 |
| 13 | 26624 |
| 14 | 56896 |
| 15 | 122640 |
| 16 | 261078 |
| 17 | 557056 |
| 18 | 1176876 |
| 19 | 2490368 |
| 20 | 5237360 |
| 21 | 11008704 |
| 22 | 23057408 |
| 23 | 48234496 |
| 24 | 100635144 |
| 25 | 209714400 |
| 26 | 436154368 |
| 27 | 905962860 |
| 28 | 1878931264 |
| 29 | 3892314112 |
| 30 | 8052800160 |
| 31 | 16642998272 |
| 32 | 34359209436 |